广州化工
廣州化工
엄주화공
GUANGZHOU CHEMICAL INDUSTRY AND TECHNOLOGY
2014年
24期
70-71,93
,共3页
锂离子电池%碳包覆%橄榄石结构
鋰離子電池%碳包覆%橄欖石結構
리리자전지%탄포복%감람석결구
lithium ion batteries%carbon-coated%olivine structure
磷酸铁锂是一种很有应用前景的锂离子电池正极材料，由于其电导率低限制了它的广泛应用，而碳包覆是提高其电化学性能的方法之一。以食用蔗糖为碳源在不同的温度下制备了LiFePO4/C样品，并采用扫描电镜、 X-射线衍射和电化学性能测试等技术对样品进行了表征，发现样品为橄榄石型结构，同时在700℃制备的样品具有较好的循环性能和比容量。
燐痠鐵鋰是一種很有應用前景的鋰離子電池正極材料，由于其電導率低限製瞭它的廣汎應用，而碳包覆是提高其電化學性能的方法之一。以食用蔗糖為碳源在不同的溫度下製備瞭LiFePO4/C樣品，併採用掃描電鏡、 X-射線衍射和電化學性能測試等技術對樣品進行瞭錶徵，髮現樣品為橄欖石型結構，同時在700℃製備的樣品具有較好的循環性能和比容量。
린산철리시일충흔유응용전경적리리자전지정겁재료，유우기전도솔저한제료타적엄범응용，이탄포복시제고기전화학성능적방법지일。이식용자당위탄원재불동적온도하제비료LiFePO4/C양품，병채용소묘전경、 X-사선연사화전화학성능측시등기술대양품진행료표정，발현양품위감람석형결구，동시재700℃제비적양품구유교호적순배성능화비용량。
LiFePO4 was a potential cathode candidate for lithium ion batteries, but with poor electronic conductivity, its application was limited. LiFePO4 was prepared by carbon-coated in order to improve its electrochemical property. LiFePO4/C samples were prepared by adding sugar to the synthetic precursor at different temperatures. The samples were characterized by Sanning Ectron Microscopy ( SEM ) , X-ray diffraction ( XRD ) and characterization of electrochemical property, their crystal phases were olivine structure, but only the sample obtained at 700 ℃ had a larger discharge capacity and good electrochemical properties.
